the living world 2 (desert) Flashcards
where are deserts normally found
15-30 degrees north and south of the equator
what is the annual temperature range in deserts
the annual temperature range in deserts is 25-40 degrees celcius
how much rainfall do deserts usually get per year
250 mm per year
what percentage of copper needs does the Bingham Copper mine provide
the Bingham Copper mine provides 15% of all of the U.S.A’s copper needs
how many homes can the Hoover dam power
the Hoover dam can power 1.3 million homes
how many types of crops were grown in the Imperial Valley farm
75 different types of crops were grew in the Imperial Valley farm
how much are the total crops worth from the Imperial Valley farm per year
$2 billion is generated from the Imperial Valley farm per year
How many people visit Las Vegas per year
42 million people visit Las Vegas per year
How much money does tourism generate in Las Vegas
tourism in Las Vegas generates $50 billion per year
how many years has it been since regular rainfall in Burkina Faso
it has been 15 years since regular rainfall in Burkina Faso
What is the population growth rate in northern Burkina Faso?
the population growth rate in northern Burkina Faso is 3% (UK is 0.6%)
what percent of the Sahel’s population is engaged in agriculture
90% of the Sahel’s population is engaged in agriculture
what is the average annual loss of soil in the Sahel
the annual loss of soil in the Sahel is 50 tonnes per hectare
How long is the green wall going to be
the green wall will be around 8000km
How much will the green wall cost
the green wall will cost $33 billion
